Improvement in tin-tubing machine



iintrii lteres JAMES N. ADAMS, OF CHILLIOOTHE, 1\IISSOURI.

Letters Patent No. 102,466, dated May 3, 1870.

IMPROVEMENT I TIN-TUBING- MACHINE..

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Beit known that I, JAMES N. ADAMS, of Chillicothe, in the county of Livingston and State of Missouri, havje invented anew and improvedv Tin-Tubing Machine; and I do hereby declare that the following isa full, clear, and exact description thereof, which will lenable others skilled in the art to make and use the same, reference being had to the accon'lpanyng drawings forming part of this specification.

lhis invention relates to an improved machine for bending sheets of tin into tubing, lapping the edges andthe ends of the section, and holding them .for soldering.; and It consists of a sectional tubular shell, capable of being expanded or contracted, and having a slot along one side for the admission of the tin to the interior, wherein is a mandrel or former, divided longitudinally, for the purpose of expanding and contracting the same in a manner hereinafter explained.

Secured on one part of this mandrel or former is a copper strip. Under this strip the edge of the tin is inserted, to hold it in place while the said mandrel is turned, and winds the tin around it into the shell, after which the lapped edges are held opposite the slot in the shell for soldering, and pressed together' by a hinged presser attached to the shell and projecting through the slot.

The section thus formed is then shoved along 'the mandrel, so that the next sheet oit' tin bent up will be lapped 011 the end of it, all as hereinafter more fully` specified.

Figure 1 is a sidcelcvfation of my improved tubingmachine.

Figure 2 is an end elevation of the same.

Similar let-ters otreference indica-tc corresponding parts.

The shell is composed otl two parts, A B, of wood or other suitable material, with semicircular grooves inthe faces, which are clamped closely together at one end by a bolt and nut, C, and at the other end by a bolt, D, and eccentric lever, E, so that they may be forced snugly together or slightly separated.

F is a slot separating that end of the shell A B, the bolt O passing transversely through it.

Gis a long presser-plate, hinged to the top of the part A, and bent' downward so as to project through a. widcslot opening from the top into thehollow space formed by the semicircular grooves.

H is a mandrel or former, made in two semicircular parts, connected together at one cud by alink, l,

jointed at both ends, and similarly at the other end by a crank-lever, K, so that `the two parts may be moved lengthwise on each other to separate themA slightly or bring them together.

This mandrel or former is made -to iit th hole through the shell loosely, and project at bothends, one having a head to which the crank is iitted, and theother is prolonged as much, `or nearly as much,l as lthe width ofthe vtin to be formed.

One edge of the sheet of tin to be bent is passed through the-slot in the shell, and under the copper' strip L' on the former. Y

The former or' mandrel is then turned, after forcing the two parts of the shell together by tliccecentric lever E, by which the sheet is drawn innand bent int-o tubular form, the edges'lappingeach other and brought opposite the slot andsolderell 5f and, if necessary, the presser G is forced down upon the upper edge., to hold it firmly down upon the other to solder.

'.lo discharge thc tube so formed, the lever` K is moved to contract'the mandrel, and the eccentric lever is moved to open that end of the shell, which result is secured by the bolt C drawing together the two parts of `the shell A B at the slot F.

Il his permits the tube to be yshoved ont on the end ofthe mandrel projecting from the shell; but it is Ynot shoved so far bnt'that the4 neigt sheet of tin lput in to be bent up will, in the act 'ot'ben'ding .be lapped onthc tube sufficient to be joined thereto by soldering.

Each successive section, together with that pre 'viously attached, is shoved along the mandrel. In this way the projecting tnbcis suitably supported until.v

the required length is produced.

- Having thus described my invention,

I claim as new and desire to secure by Letters'v Patent 1. The combination of the shell and mandrel or former, constructed, arranged, and operating substantially as speced.

2. The combination, with the shell and mandrel, of the presser G, substantially as specified.

. 1N. ADAMS.

Witnesses:

JOHN (locales, F. K. FLETCHER. 

